Kornerupine and Star Sapphire Physical Properties

Kornerupine

Star Sapphire

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.25-3.453.90-4.05

1 7.18

1.5 Fracture

ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009), Brittle, Uneven

Not Available

1.6 Cleavage

Good on {110}

Not Available

1.7 Mohs Hardness

6.5Not Available

2 10

1.8 Chemical Composition

Mg 3Al 6(Si,Al,B) 5O 21(OH)Walter Schumann , Gemstones of the world (2001) More from other references

Al 2O 3Ulrich Henn and Claudio C.

Kornerupine and Star Sapphire Chemical Formula

While comparing Kornerupine and Star Sapphire physical properties, the important data you should know is its chemical composition. Since chemical formula defines the molecular structure of the crystal, most of the physical properties like color, tenacity, solubility are governed by Kornerupine and Star Sapphire chemical formula.

Chemical formula of Kornerupine- Mg 3Al 6(Si,Al,B) 5O 21(OH)Walter Schumann , Gemstones of the world (2001) More from other references
Chemical formula of Star Sapphire- Al 2O 3Ulrich Henn and Claudio C.

Compare Green Gemstones

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Kornerupine and Star Sapphire Specific Gravity

Another important criteria for qualitative analysis of gemstones is Kornerupine and Star Sapphire Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Kornerupine and Star Sapphire Optical Properties during the identification of gemstone. Specific gravity of Kornerupine is 3.90-4.05 whereas that of Star Sapphire is 3.90-4.05.